I find the recent development and the increasing number of licensees encouraging in Adobe's attempt to deliver an open file format and interoperability for e-book devices.

I can't take that statement seriously...

Open file formats and interoperability have nothing to do with supporting half baked DRM schemes. Adobe is only there to entrench it's own technology. Though I'll give them this. PDF is an ISO standard(since 2008). DRM is not a solution it's part of the problem.